Pressing-plunger mechanism.



W. J. MILLER.

PRESSING PLUNGER MECHANISM.

APPLICATION FILED JUNE 22,1918.

1,,3%6,65@ Patenfed Dec. 30,1919.

WITNESS PRESSlNGr-?LUN MECHANISM.

menses.

Specification of Letters Patent.

Patented Dec. 3%, this.

original application filed August 11, 1917, Serial No. react-v". Divided and this application. filed June 532, 1918. Serial No. 241,431..

To all whomit may concern:

Be it known that 1, WILLIAM J. MILLER, a citizen of the United States, and residing in the borough of Swissvale, in the county of Allegheny and State of Pennsylvania, have invented or discovered new and useful Improvements in PressingPlunger Mechanism, of which the following is a specification. W

This patent application is a division of mypreviously filed patent application Serial N umber 185,64'Z', filed August 11, 1917. My present invention consists in certain new and useful improvements in pressing plungers for machines for the manufacture of pressed glass articles.

More particularly, my present invention comprises means for mounting the plunger in the machine in such a manner that it may be adjusted and alined so as to properly center it with the mold, or molds as the latter are presented in the forming or pressing position.

In the accompanying drawings, which are merely intended to illustrate the principles of my invention without limiting the scope of the same to the construction shown, Figure 1 is a broken elevation of the pressing mechanism of a machine, the same being partially sectional to show the partspl ig. 2 13 an enlarged detail of the same wlththe plunger omitted, and Fig. 3 is a horizontal section along the line ill-Jill in Fig. l.

The following is a detailed description of the drawings:

B and C represent a pair of upright standards which form part of the general machine not shown in full.

N represents a cross ,head slidingli, mounted on said standards and upon whlch the pressing plunger P is mounted. To indicate generally the application of power to raise and lower said cross head .111 the pressing operations, I have shown toggle links 176, but it will be understood that any of said cross head into the opening 178.-

180 is a threaded shaft extending down through said hole and havin its lower end screwed into a threaded ho e 178 in the floor of the opening 178. 181 is a cross bar adjustably fixed on the upper end of the shaft '180 by means of upper and lower locking nuts 182. A

The outer ends of the bar 181 are provided with vertical holes for the downward extension of the headed bolts 183 which extend down through the cylindrical sleeves 18d which slide in vertical cylindrical bearings 185 in the cross head N. llhe lower threaded ends of the bolts are screwed into threaded holes in the spring; plate 0, thus supporting said sprin plate. The upper ends 0 the, sleeves 184; are. countersunk, as shown, to seat the lower ends of the helical springs 38h which are coiled about the bolts 188 and hear against the cross bar 181,. thus tending to resiliently depress the spring plate if) below the cross head N.

187 is a horizontal yoke adjustably supported on the shaft 180 by means of the screw collar 188. 189 represents a pair of gripping fingers, pivoted at their upper ends to the extremities of the yoke 18'? and depending through slots 190 in the bottom of the opening 178. The lower ends of said fingers are provided with inwardly extending hooks which fit under and engage the beveled top flange 191 of the pressing plunger P, thus supporting said plunger in place.

Q is a ring provided with radial handles 192 and internal caln surfaces 193. The ring is rotatahly'supported below the cross head N by means of depending hooked hangers 194 which permit the ring to be shifted laterally. Thus the ring Q may be said to he fioatably supported from the cross head. The ring Q encircles the upper'end of the pressing plunger and suspension lingers. By turning the ring in the proper direction, the cam surfaces 193 force and lock the fingers in snug and rigid supporting an gagement with the beveled flange 191 of the plunger. .By screwing up the collar 188 on the shaft 180, thus elevating the yoke 187', the upper end of the pressing plunger P is forced up against the bottom surface of the cross head N, thus rigidly connecting the plunger with the cross head.

The plunge-r may be adjusted laterally or horizontally in relation to the cross head by shifting the ring Q before the collar 188 is screwed up to clamp the plunger against the cross head. The plunger may he readj usted iiri'elation to the cross head by screwing the collar 188 down on the shaft 180 and the ring Q and the plunger]? may then be shifted, as desired.

'A rotation of the ring in the direction reverse to that above referred to releases the fingers 189 and permits the detachment of the plunger.

Before the'machine is put into operation for the manufacture of glass articles, a' mold is centered under the pressing mechanism and the proper plunger is mounted and adjusted so that it :will properly enter the mold when depressed. By means of' the,

mechanism for mounting and adjusting the plunger just described, any irregularity or lack of a-linement in the various elements, such as between the mold table and the pressing mechanism may becorrected.

The office of the spring plate 0 is to resiliently engage the mold top and seat itself thereon as the plunger is depressed into the 'mold, and to lag behind the rising plunger to steady the mold and its contents and to strip the glass from the emerging plunger.

What I desire to claim is as follows- -1. In a machine for pressing articles of glass, a plunger mechanism consisting of 'a sliding support horizontally disposed and provided with vertical slots through the 1 same, fingers with hooked lower ends pivotally mounted'on said support and depending through said slots, a pressing plunger havin its head provided with a perimetral shoul er adapted to be secured to the under surface of said support, and an annular,

shoulder adapted to be secured to the under surface of said support, an annular lock- .ing member rotatably mounted against the under surface of said support and provided with internal cam surfaces to engage the lower ends of said fingers and clamp the same into engagement with said Shoulder,-

and means for shift-ing said member lat erally to properly aline said plunger,

3. In a machine for pressing articles of.

glass, a plunger mechanism consisting of a sliding support horizontally disposed and provided with vertical slots throu h' the same, fingers with hooked lower en s pivotally mounted on said support and depending through said slots, a pressing plunger having itshead provided with a perimetral shoulder adapted to be secured against the under surface of said support, an annular locking member rotatablymounted' against the under surface of said support and provided with internal cam surfaces adapted to engage the lower ends of said fin ers and clamp them into engagement with said shoulder, and means for raising said fingers relative to said support to tighten the plunger against saidsupport.

4. Ina machine for pressinglarticles of glass, a plunger mechanism consisting of a sliding supportlhorizontally disposed and provided with vertical slots through the same, fingers with hooked lower ends pivotally mounted on said support and depending through said slots, a pressing plun- -ger provided with a perimetral shoulder adapted to be secured to the under surface of said support, an annular locking member rotatably mounted against the under surface of said support and provided with internal cam surfaces adapted to engage the lower ends of said fingers and clamp the same' into engagement with said shoulder, means for-shifting said member laterally to properly aline said plunger, and means for raising said fingers relative to said support to tighten the plunger against said support.

'5. In a machine for pressing articles of glass, a plunger mechanism consisting of a sliding support horizontally disposed, a, member'mounted on said support and ad-' justable vertically in relation thereto, vfingers with hooked lower ends .pivotally depending from said member, a pressing plunger having its head provided with a perimetral shoulder adapted to be secured to the under surface of said support, and a locking ring rotatably mounted againstthe under surface of said support and provided with internal cam surfaces adapted to ender;

6; In a machine for pressing articles of glass, a plunger mechanism consisting of a sliding support horizontally disposed, a member mounted on said support and adjustable vertically in relation thereto, fin gers with hooked lower ends pivotally depending fromsaid member, a pressing plunger having its head provided with a perimet ral shoulder adapted to besecured to the under surface of said support, a looking ring rotatably mounted against the under surface of said support and provided with internal cam surfaces ada ted to engage the lower ends of said n ers and clamp them .into engagement with said shell der, and mea for shifting said ring laterally to properl? aline said plunger,

gage the lower ends of said fingers and v clamp them in engagement with said shoul masses 7. In a machine for pressing articles of glass a plunger mechanism consisting of a sliding support horiz'ontally disposed, a shaft extending upwardly from, said support, a yoke adjustably mounted on said shaft, fingers with hooked lower ends pivotally depending from said yoke, a press ing plunger having its head provided with a perimetral shoulder adapted to be secured to the under surface of said support, and a locking ring rotatably secured to the under surface of said support and provided with internal cam surfaces adapted to engage the lower ends of said fingers and clamp them into engagement with said shoulder:

8. in a machine for pressing articles oi? glass, a plunger mechanism consisting of a sliding support horizontally disposed a shaft extending upwardly from said support, a yoke adjustaloly mounted on said shaft fingers with hooked lower ends'pivotally depending from said yoke, a press ing plunger having its head provided with a periinetral shoulder adapted to be secured to the under surface of said'support, a locking ring rotatahly secured to the under surface of said support and provided with internal cam surfaces adapted to engage the lower ends of said fingers and clamp them into engagement with said shoulder, and means for shifting said ring laterally to properly aline said plunger.

Signed Pittsburgh, Pennsylvania this 18th day of June 1918.

WILLIAM J. MILLER. 

